package com.framework.netty;

import io.netty.bootstrap.Bootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioSocketChannel;

import java.net.InetSocketAddress;

public class EchoClient {
    private final String host;
    private final int port;
    public EchoClient(String host, int port) {
        this.host = host;
        this.port = port;
    }
    public void start() throws Exception {
        EventLoopGroup group = new NioEventLoopGroup();
        try {
            Bootstrap b = new Bootstrap(); //1
            b.group(group) //2
             .channel(NioSocketChannel.class) //3
             .remoteAddress(new InetSocketAddress(host, port)) //4
             .handler(new ChannelInitializer<SocketChannel>() { //5
                 @Override
                 public void initChannel(SocketChannel ch)
                         throws Exception {
                     ch.pipeline().addLast(
                             new EchoClientHandler());
                 }
             });
            ChannelFuture f = b.connect().sync(); //6
            f.channel().closeFuture().sync(); //7
        } finally {
            group.shutdownGracefully().sync(); //8
        }
    }
    public static void main(String[] args) throws Exception {

        final int port = Integer.parseInt("8095");
        new EchoClient("127.0.0.1",port).start();
    }
}
